CVE-2025-59340

jinjava is a Java-based template engine based on django template syntax, adapted to render jinja templates. Priori to 2.8.1, by using mapper.getTypeFactory().constructFromCanonical(), it is possible to instruct the underlying ObjectMapper to deserialize attacker-controlled input into arbitrary classes. This enables the creation of semi-arbitrary class instances without directly invoking restricted methods or class literals. As a result, an attacker can escape the sandbox and instantiate classes such as java.net.URL, opening up the ability to access local files and URLs(e.g., file:///etc/passwd). With further chaining, this primitive can potentially lead to remote code execution (RCE). This vulnerability is fixed in 2.8.1.

CVSS v3 9.8 CRITICAL

9.8^/10

CVSS v3 : CRITICAL

Vector :

Exploitability : 3.9 / Impact : 5.9

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://github.com/HubSpot/jinjava/commit/66df351e7e8ad71ca04dcacb4b65782af820b8b1	Patch
https://github.com/HubSpot/jinjava/releases/tag/jinjava-2.8.1	Release Notes
https://github.com/HubSpot/jinjava/security/advisories/GHSA-m49c-g9wr-hv6v	Vendor Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:hubspot:jinjava:*:*:*:*:*:*:*:*

History

No history.

Information

Published : 2025-09-17 20:15

Updated : 2025-09-26 13:11

NVD link : CVE-2025-59340

Mitre link : CVE-2025-59340

CVE.ORG link : CVE-2025-59340

JSON object : View

Products Affected

hubspot

jinjava

CWE

CWE-1336

Improper Neutralization of Special Elements Used in a Template Engine

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